How to Configure Push Notifications

I come through this to report that I am finding it difficult to configure Push Notifications in my Application, both on the Android and iOS platforms.

Before you ask, yes, I’m following AppGyver’s own documentation, however, I noticed that many details are missing and it’s not news to anyone that the firebase documentation is totally confusing.

Is it that difficult to configure push notifications in appgyver?

Isn’t there a detailed walkthrough?

The documentation I’m reading:

The problem is that I create the same logic as described in this last link, however, the output just goes into error, however, it is the appgyver documentation itself that says to do so. I also saw that Firebase Cloud Messaging must be configured, but if it depends on their Documentation I’m lost

Can some good soul detail step by step what should be done, e.g. first this, then that, etc